Bug ID 484948: UDP connflow may aborted from parked iRule in server_closed.

Last Modified: Nov 07, 2022

Affected Product(s):
BIG-IP LTM(all modules)

Known Affected Versions:
11.4.1, 11.6.0, 11.6.0 HF1, 11.6.0 HF2, 11.6.0 HF3

Fixed In:
12.0.0, 11.6.0 HF4, 11.4.1 HF10

Opened: Oct 16, 2014

Severity: 2-Critical

Related Article: K16732


Some UDP idle flows will abort a parked iRule after the UDP idle timeout.


The impact of this issue is the iRule aborts and impacts performance. The user cannot keep accurate connection count per client using iRules.


Conditions leading to this issue include: 1) UDP virtual, drop connection on response. 2) client_closed and server_close iRule, and parked in irule for a long time 3) make the the virtual expired when iRule is parking.


Set the idle timeout to a different value in client and sever will make it happen much less frequently.

Fix Information

Resolve problem of double calling functions that caused iRule to abort.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips